Apparatus

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sensors Mode-S transponder

A38641

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N326SY · operated by SKYWEST AIRLINES INC

Hex
A38641
Octal
50703101
Decimal
10,716,737
Country
US
Tail
N326SY
Type
E75L
No current signal · last broadcast Jul 26, 21:50 UTC
Flights observed
707
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:50 UTC

Last known position

Most recent position reported by Mode-S A38641.

Country allocation

The ICAO 24-bit address A38641 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
SKW3712 - 18 2026-07-15
SKW3915 SkyWest Airlines 14 2026-06-06
SKW3992 SkyWest Airlines 12 2026-06-12
SKW3820 - 9 2026-07-15
SKW3812 - 9 2026-07-14
SKW4127 SkyWest Airlines 8 2026-06-10
SKW3765 SkyWest Airlines 8 2026-07-04
SKW3692 SkyWest Airlines 8 2026-07-23
SKW3681 - 8 2026-06-27
SKW134F - 8 2026-07-14
SKW4115 - 7 2026-07-15
SKW4098 - 7 2026-07-15
SKW3876 SkyWest Airlines 7 2026-05-14
SKW3707 SkyWest Airlines 7 2026-06-12
SKW4253 - 6 2026-06-28
SKW4155 SkyWest Airlines 6 2026-04-26
SKW4134 - 6 2026-06-25
SKW4121 SkyWest Airlines 6 2026-07-19
SKW4084 - 6 2026-07-03
SKW4041 SkyWest Airlines 6 2026-06-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3966 AUS → CVG Jul 26, 19:10 UTCJul 26, 21:25 UTC2h 15m
2026-07-26 SKW3966 AUS → CVG Jul 26, 15:15 UTCJul 26, 17:45 UTC2h 30m
2026-07-26 SKW3972 PSC → SEA Jul 26, 12:40 UTCJul 26, 13:15 UTC35m
2026-07-26 SKW3972 PSC → SEA Jul 26, 12:36 UTCJul 26, 13:06 UTC30m
2026-07-26 SKW4017 BIS → MSP Jul 26, 06:05 UTCJul 26, 06:35 UTC31m
2026-07-26 SKW4043 HPN → ATL Jul 26, 03:00 UTCJul 26, 04:20 UTC1h 20m
2026-07-26 SKW4043 HPN → ATL Jul 26, 00:20 UTCJul 26, 01:55 UTC1h 35m
2026-07-25 SKW3911 MSP → MDW Jul 25, 22:45 UTCJul 25, 22:55 UTC10m
2026-07-25 SKW3911 MSP → MDW Jul 25, 20:05 UTCJul 25, 22:55 UTC2h 50m
2026-07-25 SKW3911 MSP → MDW Jul 25, 20:06 UTCJul 25, 22:29 UTC2h 23m
2026-07-25 SKW3911 MSP → MDW Jul 25, 15:55 UTCJul 25, 18:35 UTC2h 40m
2026-07-25 SKW3781 MFR → SEA Jul 25, 13:20 UTCJul 25, 14:15 UTC55m
2026-07-25 SKW3954 SEA → MFR Jul 25, 05:00 UTCJul 25, 06:05 UTC1h 5m
2026-07-25 SKW4031 LAX → ABQ Jul 25, 01:35 UTCJul 25, 03:55 UTC2h 20m
2026-07-24 SKW4031 LAX → ABQ Jul 24, 22:25 UTCJul 25, 00:45 UTC2h 20m
2026-07-24 SKW3878 CLE → LGA Jul 24, 19:30 UTCJul 24, 20:30 UTC1h 0m
2026-07-24 SKW3806 LAX → OAK Jul 24, 17:00 UTCJul 24, 18:30 UTC1h 30m
2026-07-24 SKW3796 SFO → SEA Jul 24, 13:00 UTCJul 24, 15:35 UTC2h 35m
2026-07-24 SKW3620 SLC → XNA Jul 24, 01:45 UTCJul 24, 04:05 UTC2h 20m
2026-07-23 SKW4104 ORD → JFK Jul 23, 21:50 UTCJul 24, 00:55 UTC3h 5m
2026-07-23 SKW3802 SJC → SEA Jul 23, 19:35 UTCJul 23, 20:05 UTC30m
2026-07-23 SKW3802 SJC → SEA Jul 23, 18:00 UTCJul 23, 18:30 UTC30m
2026-07-23 SKW3740 ORD → JFK Jul 23, 15:00 UTCJul 23, 16:05 UTC1h 5m
2026-07-23 SKW3692 SLC → OAK Jul 23, 04:10 UTCJul 23, 05:15 UTC1h 5m
2026-07-23 SKW127T MFR → SEA Jul 23, 01:30 UTCJul 23, 02:25 UTC55m
2026-07-22 SKW3770 HPN → ATL Jul 22, 23:35 UTCJul 23, 00:45 UTC1h 10m
2026-07-22 SKW3966 AUS → CVG Jul 22, 19:40 UTCJul 22, 21:50 UTC2h 10m
2026-07-22 SKW3966 AUS → CVG Jul 22, 15:50 UTCJul 22, 18:20 UTC2h 30m
2026-07-22 SKW118R BOI → SEA Jul 22, 13:05 UTCJul 22, 14:10 UTC1h 5m
2026-07-22 SKW4446 SLC → BOI Jul 22, 04:20 UTCJul 22, 05:05 UTC45m
2026-07-22 SKW144J SEA → SJC Jul 22, 00:10 UTCJul 22, 01:40 UTC1h 30m
2026-07-21 SKW108R SLC → LGB Jul 21, 21:25 UTCJul 21, 22:55 UTC1h 30m
2026-07-21 SKW3815 DLH → MSP Jul 21, 17:50 UTCJul 21, 19:50 UTC2h 0m
2026-07-21 SKW3838 OMA → MSP Jul 21, 15:55 UTCJul 21, 16:45 UTC50m
2026-07-21 SKW3844 MDW → MSP Jul 21, 13:00 UTCJul 21, 14:45 UTC1h 45m
2026-07-20 SKW3791 MSP → OKC Jul 20, 23:35 UTCJul 21, 01:05 UTC1h 29m
2026-07-20 SKW3526 YWG → MSP Jul 20, 21:21 UTCJul 20, 22:20 UTC59m
2026-07-20 SKW3526 YWG → MSP Jul 20, 21:20 UTCJul 20, 22:25 UTC1h 5m
2026-07-20 SKW192E IMT → DTW Jul 20, 18:40 UTCJul 20, 19:50 UTC1h 10m
2026-07-20 SKW3813 TWF → SLC Jul 20, 14:55 UTCJul 20, 17:20 UTC2h 25m
2026-07-20 SKW4015 IND → AUS Jul 20, 11:35 UTCJul 20, 13:40 UTC2h 5m
2026-07-20 SKW3731 SEA → SJC Jul 20, 00:35 UTCJul 20, 02:50 UTC2h 15m
2026-07-19 SKW4053 - Jul 19, 22:10 UTCJul 19, 23:00 UTC50m
2026-07-19 SKW4053 - Jul 19, 20:10 UTCJul 19, 20:55 UTC45m
2026-07-19 SKW4121 MDW → DTW Jul 19, 17:45 UTCJul 19, 18:15 UTC30m
2026-07-19 SKW4121 MDW → DTW Jul 19, 17:42 UTCJul 19, 18:29 UTC47m
2026-07-19 SKW4177 AUS → MFE Jul 19, 15:50 UTCJul 19, 16:30 UTC40m
2026-07-19 SKW3950 JFK → IAD Jul 19, 12:15 UTCJul 19, 14:35 UTC2h 20m
2026-07-19 SKW3930 - Jul 19, 10:10 UTCJul 19, 10:35 UTC25m
2026-07-19 SKW3907 - Jul 19, 03:00 UTCJul 19, 03:25 UTC25m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N326SY page for operator, model, and routing details .

Mode-S A38641 frequently asked

What is Mode-S code A38641?
A38641 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N326SY.
Where is Mode-S A38641 registered?
Mode-S code A38641 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A38641 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A38641, octal 50703101, decimal 10,716,737.
What flights does A38641 operate?
Mode-S A38641 has broadcast 20 distinct callsigns, including SKW3712, SKW3915, SKW3992, SKW3820, SKW3812.